information about cleveland kidnapping suspect ariel castro. We've learned about ace string of complaints against him going back decades and we might have new insight foo his bizarre behavior behind bars. Here's abc's alex perez. Reporter: The man who allegedly held three women captive for ten years appears to be cracking under the pressure of being locked up himself. Guards are so concerned ariel castro might hurt himself they inspect every cup he uses to make sure it's not chipped. Jail logs show he has even been caught walking around his cell naked. Overnight police released recordings of radio traffic of CASTRO'S ARREST MAY 6th. We have the male and the car at mcdonald's at 32nd and clark. Reporter: A far broader scene as officers broke down this door to rescue the women they say he was holding inside. This morning, neighbors say they want the house which is now fenced off as evidence torn down. It symbolizes pain and grief. Reporter: Abc news has also learned more about castro's previous run-ins with cleveland police, six in all dating as far back as 1989. Police were called to his house after allegations he assaulted or threatened people including three alleged beatings of his ex-wife bring maul da figueroa, once shortly after she had brain surgery. Castro received probation for one charge but each of the five other charges were eventually dropped. And figueroa died last year. Guards are watching castro so closely they have to write down everything he's doing every ten minutes.

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